code: def run(self):
      from dvc.config import ConfigError
  
      if self.args.name is None and not self.args.unset:
          conf = self.config.read(self.args.level)
          try:
              ui.write(conf["core"]["remote"])
          except KeyError:
              ui.write("No default remote set")
              return 1
      else:
          with self.config.edit(self.args.level) as conf:
              if self.args.unset:
                  conf["core"].pop("remote", None)
              else:
                  merged_conf = self.config.load_config_to_level(
                      self.args.level
                  )
                  if (
                      self.args.name in conf["remote"]
                      or self.args.name in merged_conf["remote"]
                  ):
                      conf["core"]["remote"] = self.args.name
                  else:
                      raise ConfigError(
                          "default remote must be present in remote list."
                      )
      return 0
  
imports: from dvc.cli import formatter
  from dvc.cli.utils import append_doc_link
  from dvc.commands.config import CmdConfig
  from dvc.ui import ui
  from dvc.utils import format_link
label_desc: Use image node_id 1 for calling the CmdRemoteDefault obj's underlying member method code with example usage: obj.run() and returns: int, int